Origin
Made in Finland
Designed and developed in Finland, for the conditions of the north: forests, lakes and long winters.
- Real terrain
Elevation, forest and water from national map data.
- Every season
Plan for the conditions you will deploy in.
- No infrastructure
Radios form and repair the network themselves.
- Same software
Simulator to field: the radios run what you tested in Loom.
Rihma Loom
The mission-planning simulator that shows how your network will perform on real terrain, before anything is deployed.
- Plan with confidenceCoverage, relay placement and frequency use, evaluated before deployment, not after.
- Rehearse under pressureIntroduce jamming, losses and moving units, and see how the network holds up.
- Replay any momentEvery event is recorded, so teams can review exactly what happened and why.
See it on your own area of operations. Book a demo on your terrain
01How it works
From the planning table to the field
Rihma is Finnish for thread. Loom weaves the network on the map; Link carries it in the field. One workflow and the same software, from the first plan to the last radio.
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01Plan
Plan on a map of your real terrain
Place units and relays on real elevation, forest and water data. Choose frequencies and see the predicted coverage of every radio before anything moves.
- Predicted coverage for every radio
- Relay positions checked against the terrain
- Frequency use worked out in advance
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02Rehearse
Rehearse what could go wrong
Run the mission with jamming, lost radios and moving units. Watch links drop and the network route around them, then adjust the plan until it holds.
- Jamming and interference
- Lost or damaged radios
- Units on the move
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03Deploy
Deploy with the software you tested
Rihma Link radios run exactly the software that was proven in Loom. Every event is recorded, so afterwards your team can replay any moment and see what happened and why.
- The same software as the simulator
- Every event recorded
- Replay for after-action review
Ready to rehearse your own network? Book a demo on your terrain
02Rihma Link · Mesh radio
A radio that forms its own network
Rihma Link is a tactical mesh radio. The radios find each other, route around obstacles and keep traffic flowing when units move or links are lost, with no fixed infrastructure required.
- Self-forming, self-healingThe network reorganises itself as units move or radios are lost.
- Designed for interferenceFrequency hopping and authenticated links, designed to keep traffic moving when the spectrum is contested.
- Tested in Loom firstLink runs the same software that was tested in the simulator.
Rihma Link RL-1 is in prototype; Loom demonstrations are available now.
Every radio relays for the others. No towers, no base station.
03Why Rihma
Built in the north, built to be trusted
Three commitments behind everything we make, from the planning software to the radio in the field.
Foundation
Written in Rust for safety
A memory-safe foundation from the radio to the planning software, built to be dependable when it matters most.
Accuracy
Grounded in physics
Every propagation model is tested against the ITU-R recommendation or published reference it comes from, and terrain predictions against more than 23,000 published field measurements.
04About
Built in Finland, from the radio to the planner
Rihma Systems is a Finnish defence technology company, founded in 2026. We build planning software and radios for resilient tactical networks, written in memory-safe Rust from the radio to the planner, so the software you rehearse with in Loom is the software that runs in the field.
- Founded
- 2026, Finland
- Rihma Loom
- Demonstrations available now
- Rihma Link RL-1
- Prototype
05Get started
Plan the network before you buy the radios
See Rihma Loom on your own terrain. We will prepare a demonstration scenario for your area of operations.
What happens next
- Tell us about the missionA short conversation about your area of operations and what the network needs to do.
- We build your scenarioLoom is prepared on your own terrain, ready for your team to explore.
- Evaluate togetherA live session with your planners and technical evaluators, with time for their questions.